Dilan77
asked on
VoIP - using SIP gateway or existing infrastructure?
Hi
We wish to implement VoIP to (primarily) communicate with overseas offices, but at the same time reduce the phone bill for the office in general.
We have a 1 MB leased line connecting to a Cisco 2501 router (ISP managed), then a Cisco PIX 506e, through to four 3COM 4288g manageable network switches.
The remote side will be implementing Cisco Express.
A couple of questions -
i) Is it recommended we implement Cisco Express too, for compatibility issues, or can we use any system (e.g. Avaya).
ii) We will outsource the implementation to external companies, but wish to manage the maintenance. Given that none of the of the IT department has
experience in either Cisco Express or Avaya etc, what is the most straighforward application to learn.
iii) One method of implementation is to insert a VoIP card into our existing Samsung phone switch and use QoS on our existing infrastructure. Another would be to leave for the existing infrastructure for data only and use a SIP gateway and seperate ADSL line for voice (which one company is advising). Any thoughts? Their claim is that QoS can only go so far, and a seperate ADSL line/dedicated hardware is what is needed.
Would be grateful for pointers.
Cheers
We wish to implement VoIP to (primarily) communicate with overseas offices, but at the same time reduce the phone bill for the office in general.
We have a 1 MB leased line connecting to a Cisco 2501 router (ISP managed), then a Cisco PIX 506e, through to four 3COM 4288g manageable network switches.
The remote side will be implementing Cisco Express.
A couple of questions -
i) Is it recommended we implement Cisco Express too, for compatibility issues, or can we use any system (e.g. Avaya).
ii) We will outsource the implementation to external companies, but wish to manage the maintenance. Given that none of the of the IT department has
experience in either Cisco Express or Avaya etc, what is the most straighforward application to learn.
iii) One method of implementation is to insert a VoIP card into our existing Samsung phone switch and use QoS on our existing infrastructure. Another would be to leave for the existing infrastructure for data only and use a SIP gateway and seperate ADSL line for voice (which one company is advising). Any thoughts? Their claim is that QoS can only go so far, and a seperate ADSL line/dedicated hardware is what is needed.
Would be grateful for pointers.
Cheers
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well adsl can carry about 25 to 30 voip calls using QoS that is!
ASKER
so given our current infrastructure, and the fact that we won't have an amazing amount of concurrent calls, do you think we should just use our existing
line (1Mbs Leased line) and not pay out extra for the additional ADSL?
line (1Mbs Leased line) and not pay out extra for the additional ADSL?
ASKER
Our phonecalls to Nigeria still come to more than £1000/month though, so financially it'll save us money.